BIOD 152 Module 2 Exam Questions with 100% Correct Answers

Human Brain Divisions Correct Answer cerebrum, brainstem, diencephalon, cerebellum What protects the brain? Correct Answer skull, meninges, and BBB Ventricles of the brain Correct Answer cavities within the brain filled with cerebrospinal fluid; 2 lateral, 3rd ventricle, 4th ventricle Meninges Correct Answer 3 layers of connective tissue that cover and protect the CNS organs and enclose CSF. Dura Mater Correct Answer thick, outermost layer of the meninges surrounding and protecting the brain and spinal cord pia mater Correct Answer the delicate innermost membrane enveloping the brain and spinal cord. CSF Correct Answer special fluid formed in walls of ventricles from blood plasma by permeating through the choroid plexus; cushions the brain and spinal cord by providing buoyancy, allowing the brain to float. BBB Correct Answer diffusion barrier that prevents most particles from entering CNS tissue; brain and spinal cord separate from general blood circulation. Formed by impermeable brain capillaries, due to astrocytes due to need for stable chemical environment. Cerebrum Correct Answer largest part of the brain, 83%; includes median longitudinal fissure, left and right cerebral hemispheres, gyri, sulci, and fissures corpus callosum Correct Answer A bridge of white nerve fibers that connect cerebral hemispheres Cerebral cortex Correct Answer outer region of the cerebrum, containing sheets of nerve cells; gray matter of the brain Deep sulci Correct Answer frontal, parietal, temporal, occipital Frontal sulci Correct Answer controls higher level executive fx like reasoning and decision making; controls motor fx and control over voluntary muscle actions